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fegetenv, fesetenv

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< c‎ | numeric‎ | fenv
Revision as of 21:37, 31 May 2013 by P12bot (Talk | contribs)

Defined in header <<fenv.h>>
int fegetenv( fenv_t* envp );
(1) (since C99)
int fesetenv( const fenv_t* envp );
(2) (since C99)

1) Attempts to store the status of the floating-point environment in the object pointed to by envp.

2) Attempts to establish the floating-point environment from the object pointed to by envp. The value of that object must be previously obtained by a call to feholdexcept or fegetenv or be a floating-point macro constant. If any of the floating-point status flags are set in envp, they become set in the environment (and are then testable with fetestexcept), but the corresponding floating-point exceptions are not raised (execution continues uninterrupted)

Contents

Parameters

envp - pointer to the object of type fenv_t which holds the status of the floating-point environment

Return value

0 on success, non-zero otherwise.

Example

See also

saves the environment, clears all status flags and ignores all future errors
(function) [edit]
restores the floating-point environment and raises the previously raise exceptions
(function) [edit]
default floating-point environment
(macro constant) [edit]
C++ documentation for fegetenv, fesetenv